Optical repeater



FIG. 1 is a front perspective view of an optical repeater showing our new design;

FIG. 2 is the front view thereof;

FIG. 3 is the rear view thereof;

FIG. 4 is the left-side view thereof;

FIG. 5 is the right-side view thereof;

FIG. 6 is the top plan view thereof; and,

FIG. 7 is the bottom plan view thereof.

The broken lines in the drawing show unclaimed environment only and form no part of the claimed design. 

CLAIM The ornamental design for an optical repeater, as shown and described. 